Re-introduction of any species needs careful consideration about how it will cope and adapt to a new situation. For any programme of this type, to gain backing it would need years of significant scientific study.
The area shown seems to have little in the way of woodland or any habitat other than that of open moorland and crags. To me it just doesn't look appropriate for wolves, bear, bison or wild boar in its current state,its also not a very large range for them.
Scotland used to be heavily wooded, but that was a couple of thousand years ago. Very little semi-native woodland now exists. This situation needs to be addressed before we can seriously look at enriching the wildlife in it. Currently the majority of the highlands are covered in wooly maggots and to high a population or deer that prevent the re-growth of any native trees.
I would love to see wolves and bears, roaming freely in an environment that can sustain their surrvival without the need for extra feeding or fences. Not so sure about wild boar or bison though, these species can be very dangerous. And yes I have been up close and personal with a bear too and am willing to balance the risks with the fact that they are not a species that is particularly agressive, in most situations.
I would also question the landowners motives they may be genuine, but I am sceptical. The right to roam is one of our fundimental rights and not one I would be happy to give up. And yes I do live on a shooting estate where there are areas I cannot (advised against) walk at certain times of the year and it really winds me up

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So re-introduce species that it has been looked carefully at whether or not they can lead a 'normal' unfed un-pet like existance, in a countrydside that is varied enough to sustain them. But don't fence them in or
US out (and no I'm not a rambler, but I don't have a problem with anyone who is).
Oh and I'd rather take my chances with a bear than a bull any day. (or a walk down Sauchihall street at 3am)